bug report

OS:
Solaris 2.6
uname -a:
SunOS pmlsun.cacs.usl.edu 5.6 Generic_105181-12 sun4u sparc SUNW,Ultra-5_10
postgresql version:
6.4.2
compiler:
cc: WorkShop Compilers 4.2 30 Oct 1996 C 4.2
tools:
GNU Make version 3.76.1, by Richard Stallman and Roland McGrath.
flex version 2.5.4

The following commands on a fresh 6.4.2 install will cause the backend to crash:
% initdb
% createdb testdb
% psql testdb
testdb=> create table testtable (one text);
CREATE
testdb=> INSERT INTO pg_group VALUES ('testgroup');
INSERT 18473 1
testdb=> create user testuser in group testgroup;
CREATE USER
testdb=> grant all on testtable to group testgroup;
CHANGE
testdb=> select * from pg_class;
NOTICE: get_groname: group 137 not found
pqReadData() -- backend closed the channel unexpectedly.
This probably means the backend terminated abnormally before or while processing the request.
We have lost the connection to the backend, so further processing is impossible. Terminating.

--
Patrick Landry pml(at)cacs(dot)usl(dot)edu
The Center for Advanced Computer Studies at
The University of Southwestern Louisiana